Eroare de compilare: user.cpp:1:17: error: stdio: No such file or directory user.cpp: In function ‘int main()’: user.cpp:16: error: ‘FILE’ was not declared in this scope user.cpp:16: error: ‘in’ was not declared in this scope user.cpp:16: error: ‘out’ was not declared in this scope user.cpp:20: error: ‘fopen’ was not declared in this scope user.cpp:21: error: ‘fscanf’ was not declared in this scope user.cpp:23: error: ‘fclose’ was not declared in this scope user.cpp:46: error: ‘fprintf’ was not declared in this scope